Telephone-mouthpiece



I. C-HEFER.

TELEPHONE MOUTHPIECE.

APPLicAUoN FILED Anaal, 1920.

1,375,209, Patented Apr. 19, 1921.

(juve/Wto@ UNITED sTATEs PATENT oFFicE.

TELEPHONE-MOUTHPIECE.

Application led August 3'1, 1920.

To all whom t may concern:

Be it known that I, JOHN CHEFER, a citi- Zen of Belgum, residing at Chester, in the county of elaware and State of Pennsylvania, have invented a -new and useful Telephone-Mouthpiece, of which the following is a specification.

This invention relates to moutlipieces for telephones, one of its objects being to provide a device of this character which can be substituted readily for the ordinary form of mouthpiece and which has means combined therewith whereby the transmission of sound through the mouthpiece can be prevented at will so that while the user of a telephone is in the midst of a telephone conversation, he can cut off the sound to the telephone while carrying on a side conversation momentarily, thus to prevent such conversation being heard over the telephone.

A further object is to provide a device of this character which is simple and compact in construction and which can be manipulated readily.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement ofparts and in the details of construction hereinafter described and claimed, it being understood that, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings'the preferred form of the invention has been shown.

In said drawings Figure 1 is a front elevation of the mouthpiece.

Fig. 2 is a plan view thereof. Y

Fig. 3 is an enlarged section on line 3-3, Fig. 2.

Fig. 4 is a section on line 4-4, 3.

Fig. 5 is an enlarged section on line 5,-5, Fig. 1.

Fig. 6 is a side elevation of the inner Specification of Letters Patent.

Patented Apr. 19, 1921.

serial No. 407,076.

a plurality of apertures 6 therein and provided at diametrically opposed points with projecting lugs 7 and 8 which are seated in the notches 3 so as to hold the disk against rotation relative to the section 1 of the mouthpiece. The ear or lug 8 is longer than the ear 7 and projects slightly beyond the threaded outer surface of the boss 2. A pivot element 9 extends through the center of the disk 5 and engages another disk 10 provided with apertures 11 adapted to register with the apertures 6. This disk rests upon the end of the boss .and has a -radial ear 12 projecting a short distance beyond the end of the ear 8.

An interiorly screw threaded inner sleeve l2 engages the threaded boss 2 and is provided at one edge with an outstanding flange 13 from which extend prongs 14. A short slot 15 is provided in the ring or sleeve 12 and a notch 16 is formed in one wall of this slot at one end. This ring is adapted to be screwed tightly onto the boss 2 so as to b e held against rotation relative to the sectlon 1 and when it is properly positioned the lug 8 will be seated in the notch 16 thus to hold the ring 12 against rotation, while the ear 12 will project into the slot 15 and be capable of a limited movement longitudinally of the slot. This ear 12 projects through the slot 15 and into an opening 17 formed within an intermediate ring 18 mounted for rotation on the ring 12 and having an outwardly extending annular {iange 19 at one edge. An annular series of apertures 20 are formed in the intermediate ring 18 and any one of them is adapted to be engaged by a pin 21 carried by'a spring 22. This spring is secured to an outer ring 23 which extends around the rin 18 and between the flanges 13 and 19, it being possible by disengaging the pin 21 from the intermediate ring 18, to ad'ust the outer ring 23 angularly relative to t e ring 18 and to then fasten the two rings together. An arm 24 is extended radially from the outer ring 23 and is adapted to work across a segment 25 extending laterally from a lring 26 held between the ring 18 and the flange 13. The back section 27 of the mouthpiece is adapted to be screwed into the inner ring 12, and against the disk 10 after which it can be held against rotation by bending the prongs 14 inwardly into the grooves ordinaril provided in the back portion of a mout ipiece and which have been shown at 28. This inner section l27 can be screwed into the head A will obviously be moved likewise so as to shift the openings 11 out of register 'with the openings 6. By moving the arm 24 in the opposite direction, however, the openings can be brought into register. Suitable indications such as the` words off and on can be arranged on the segment 25 to indicate the direction in which the arm is to be moved. By disengaging the pin 21 from the ring 18 the arm 24 can be adjusted angularly to any desired position and then 'resecured to the rin 18.' As the ring 26 is held frictionally, t e segment 25 can be easily moved to position where it will be in proper relation to the arm 24.

What is claimed is 1. The combination with a mouthpiece section, an apertured disk in engagement therewith and held against rotation thereby, and an inner ring threaded upon Said section and held against rotation by the disk, of a second apertured disk pivotally. connected to the first named disk, a radial lug thereon having a limited sliding movement within the inner ring, an intermediate ring having an aperture for the reception of said lug and having an annular series of openings, said intermediate ring being revoluble upon the inner ring, an outer ring adjustable Aangularly upon the intermediate ring, means carried thereby for engagement with any lone of the annular series of openings for holding the outer and intermediate rings agalnst relative movement, an operating arm extending from the outer ring, and an inner mouthpiece section projectin into and secured to the inner ring, said i'sk being confined between the sections of the mouthpiece.

2. The ,combination with a mouthpiece section and an apertured disk extending across one end thereof and held against rotation thereby, of an inner ring engaged by said section and held against rotation by the apertured disk, there being a slot within said inner inner ring, a second a ertured disk mounted for rotation on the ot er disk and having a radial lug slidable within the slot in the inner ring, an intermediate ring engaged by said lugand revoluble upon the inner ring, an outer ring adjustable angularl upon the intermediate ring, a spring hel coupling in carried by the outer ring for engaging t e intermediate ring to hold said rlngs against relative movement, an actuating arm extending from the outer ring, there being annular flanges upon` the inner and intermediate rings for holding the outer ring against. lateral displacement, a frictionally held ring between thelange of the inner ring and the outer ring, an indicator carried thereby and supported adjacent the arm, and an inner mouthpiece section projecting into and engaging the inner ring and held against rotation thereby, said disk being confined between the two sections of the mouthpiece.

In testimony that I claim the foregoing as my own, I have hereto aiixed my signature in the presence of two witnesses.

JOHN CHEFER.

Witnesses CHARLES PALMER, MARIE BRUNHAMER. 

